CN115577520B

CN115577520B - BIM-based movable ice making deepening and construction method

Info

Publication number: CN115577520B
Application number: CN202211208652.5A
Authority: CN
Inventors: 赵志宇; 徐巍; 童晶; 王玉泽; 肖晓娇
Original assignee: China Construction First Group Corp Ltd; China Construction First Bureau Group North China Construction Co Ltd
Current assignee: China Construction First Group Corp Ltd; China Construction First Bureau Group North China Construction Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-06-16
Anticipated expiration: 2042-09-30
Also published as: CN115577520A

Abstract

The invention relates to a movable ice making deepening and construction method based on BIM, which comprises the following steps of: s1: simulating the heat transfer form of the ice functional layer; s2: adjusting the initial ice functional layer; wherein S1.1: model selection of simulation software; the simulation software is selected as COMSOL Multiphysics; s1.2: simulation is carried out, and ice temperature transmission simulation is carried out on the initial design scheme. For the construction method, the method comprises A1: cleaning a base layer; a2: paving a heating pipe; a3: tamping a sand layer; a4: paving a moisture-proof layer; a5: pouring a concrete leveling layer; a6: constructing a waterproof layer; a7: paving an insulating layer; a8: paving a sliding layer; a9: pouring a reinforced concrete layer; a10: a temporary waterproof layer; a11: installing a water blocking threshold; a12: mounting an ice bank pipe and a bracket; a13: and (5) making ice surface. The invention is beneficial to the constant temperature of the base layer.

Description

BIM-based movable ice making deepening and construction method

Technical Field

The invention relates to the technical field of BIM, in particular to a movable ice making deepening method based on BIM.

The invention also relates to a construction method of the movable ice surface based on BIM.

Background

In the prior art, no air isolation protective layer in the ice surface layer and the concrete structure is extremely easy to generate a cold bridge phenomenon, the safety structure of the concrete can be damaged, the concrete is enabled to generate frost cracking and bulging phenomena to different degrees, and finally cracking is caused, so that the quality of the ice surface is affected. However, the traditional construction method cannot intuitively know the transmission condition of the ice surface temperature between the functional layers, so that the influence condition of the ice surface temperature on the raft concrete layer cannot be known, and the constant temperature effect of the base layer raft concrete cannot be realized by the initial design scheme.

Disclosure of Invention

The invention aims to provide a movable ice making deepening method based on BIM, which is beneficial to optimizing an initial design scheme, so that the base raft concrete achieves the effect of constant temperature, and related problems such as frost cracking, bulging and the like are avoided.

The invention further aims to provide a construction method of the design scheme adjusted by the movable ice making deepening method based on BIM, which is beneficial to improving construction efficiency.

For a movable ice practice deepening method based on BIM, the method specifically comprises the following steps:

s1: simulating the heat transfer form of the ice functional layer based on BIM technology;

S2: based on the simulation result of the S1, adjusting the initial ice surface functional layer;

wherein S1 comprises:

s1.1: selecting model of simulation software, namely selecting the simulation software of the ice functional layer entity model as Autodesk Revit to construct the ice functional layer entity model;

the simulation software is selected as COMSOL Multiphysics, so that the heat transfer module in COMSOL Multiphysics is used for performing temperature transfer simulation work of the ice functional layer;

s1.2: simulation implementation, namely setting up an information model of the ice surface functional layer in an Autodesk Revit and passing through LiveLink ^TM for

Synchronizing to simulation software COMSOL Multiphysics, inputting parameters of heat conductivity coefficient, density and constant pressure heat fusion coefficient of each functional layer to apply COMSOL Multiphysics heat transfer module to perform initial designAnd (5) simulating ice surface temperature transfer.

As a further improvement of the deepening method, in S1.2:

s1.2: the ice surface temperature transfer simulation comprises heat conduction, heat convection, heat radiation and heat transfer forms of any combination of the three and is coupled with related physical fields, and based on the constructed ice surface functional layer, a heat transfer module is selected for data carding analysis so as to obtain a cold bridge, a bulge and related phenomena of a base layer under the functional layer;

The method comprises the steps of establishing an ice center point model for simulation, and setting the following parameters:

setting a simulated temperature value standard, including an ambient temperature and an ice surface temperature;

setting site operation time;

setting an air speed;

setting a heat transfer coefficient;

according to the simulation result, obtaining the temperature limit reached by raft concrete serving as a base layer in the set site operation time, wherein when the temperature limit is lower than the temperature limit, cold bridge, bulge and related phenomena can be caused;

the main deepening direction is determined as follows: the stability of the thermal conductivity coefficient is achieved by adjusting the functional layer between the concrete raft as the base layer and the ice layer so that the concrete raft as the base layer is at the temperature limit.

As a further improvement of the deepening method, in S1.2: the ice surface functional layer of the initial design scheme is sequentially arranged from top to bottom as follows:

30mm ice surface layer;

a 50mm removable ice bank, which is used as ice surface when in use;

150mmC F200 antifreeze reinforced concrete reinforcement layer;

0.4mmHPDE slip layer;

100mm extruded polystyrene board insulation layer;

SBS modified asphalt waterproof coiled material layer;

a 90mm rammed sand layer with a heating pipe arranged inside;

100mmC fine stone concrete screed.

As a further improvement of the deepening method, in S2:

The adjusted functional layer is determined as follows, and is sequentially arranged from bottom to ice surface layer:

the concrete comprises a foundation raft concrete layer, a PE heating pipe layer, a sand layer of 100mm, a PE film moisture-proof layer, a fine stone concrete leveling layer, an SBS waterproof layer, an extruded polystyrene board heat preservation layer, a PE film sliding layer, an anti-freezing impervious concrete layer, a PE film temporary waterproof layer, a movable ice making calandria and a bracket layer and an ice surface layer.

The method specifically comprises the following steps of:

a1: cleaning a concrete raft foundation layer;

a2: paving a heating pipe on the base layer of the A1;

a3: the tamping sand layer buries the heating pipe;

a4: paving a moisture-proof layer on the basis of the A3;

a5: pouring a concrete leveling layer on the basis of the A4;

a6: carrying out construction of a waterproof layer on the basis of the A5;

a7: paving an insulation layer on the basis of the A6;

a8: paving a sliding layer on the basis of the A7;

a9: pouring an antifreezing reinforced concrete layer on the basis of the A8;

a10: setting a temporary waterproof layer on the basis of A9;

a11: installing a shaped aluminum alloy water retaining threshold;

a12: setting a movable ice bank pipe and mounting a bracket on the basis of A10;

a13: and (5) making ice surface.

As a further improvement of the construction method, in A2:

A2.1: the heating pipe adopts PE pipes, the spacing between branch pipes is not more than 500mm, the spacing between the on-site elastic wires is controlled, the heating pipe is fixed by adopting plastic pipe clamps, and the spacing is 1.5-2m;

a2.2: a special temperature control hot melting machine is adopted to carry out hot melting connection on the tee joint at the main pipe and the branch pipe;

a2.3: after the pipeline is installed, carrying out a hydraulic test, setting the initial pressure to be 0.6mpa, and detecting after 24 hours; and reducing the pressure to 0.4Mpa until the whole ice making structural layer is constructed.

As a further improvement of the construction method, in A3:

a3.1: filtering the entering sand stone to remove stones with large particle size, and backfilling;

a3.2: before the sand layer is paved, the ground of the ice rink area is cleaned, so that the ground is clean during backfilling, and no garbage is generated;

a3.3: carrying out PE pipeline pressure test before the sand layer is paved, wherein the pressure test value reaches 0.6Mpa, the pressure maintaining value reaches 0.4Mpa, and the PE pipeline pressure has no obvious pressure drop until the sand layer is paved;

a3.4: the sand layer is paved and is constructed according to the design requirement, the tamping machine is adopted to repeatedly tamper to ensure the tamping, the flatness is preferably controlled within +/-5 mm, the laser leveling instrument is adopted to perform elevation control, the sand layer is paved and is backfilled by adopting mechanical and manual cooperation, and the backfilling sequence is that the backfilling is performed from outside to inside.

As a further improvement of the construction method, in A4:

a4.1: the moisture-proof layer adopts a PE film with the thickness of 0.4mm, and is used for preventing water vapor on the ice surface from being conducted downwards and penetrating into the sand layer;

a4.2: the PE films are connected by adopting a special temperature control hot-melting machine in a hot-melting way, so that single PE films are continuously hot-melted to form a whole;

as a further improvement of the construction method, in A5-a 13:

a5.1: paving phi 4@200X100 cold-drawn steel wire meshes, pouring a 60-thickness C20 fine stone concrete leveling layer, and pouring concrete according to the required blocks;

a5.2: the concrete leveling layer is used for finding a slope in the direction of the drainage ditch according to the gradient required by design, and the concrete leveling layer is subjected to calendaring treatment to ensure that the flatness meets the requirement;

a5.3: in the process of concreting and curing, the pressure of a heating pipe system is kept at a pressure of not less than 0.4Mpa, and the curing time is not less than 48 hours after the concreting is finished;

a6.1: the waterproof layer adopts a double-layer SBS modified asphalt waterproof coiled material with the thickness of 4mm+3mm, the type is polyester tire II type, the low-temperature flexibility is-25 ℃, and no crack exists;

a6.2: before the waterproof coiled material is paved, the base layer in the ice rink area is cleaned, so that the defects of hardness, no hollowness, sand, cracks, looseness, ash falling and unevenness of the base layer are ensured, and the base layer is dried and clean;

A6.3: after the base layer is cleaned, the base layer treating agent is painted, so that the base layer treating agent is ensured to be uniform and consistent;

a6.4: after the base layer treating agent is dried, carrying out additional layer treatment on the yin and yang corner parts according to design requirements, and adding an additional waterproof layer with the length of 500 mm;

a6.5: when the lap joint width of the coiled material is 100mm on each side, the lap joint of the second layer of coiled material is staggered with the lap joint of the first layer by 1/3 of the amplitude of the coiled material, the two adjacent coiled materials are staggered by 1/2, the upper coiled material and the lower coiled material cannot be vertically paved, and the first layer and the second layer are fully staggered and are fully paved;

a6.6: after the coiled material is paved, the lap joint part, the end part and the coiled material collecting part are subjected to sealing treatment, and then trowelling is performed to form an obvious asphalt edge banding strip;

a7.1: the heat-insulating layer is a double-layer heat-insulating layer with the thickness of 50mm and the total thickness of 100mm of extruded polystyrene board, the deep typesetting design of the heat-insulating board is carried out before laying, and the construction is carried out strictly according to a typesetting diagram in the construction process;

a7.2: when the plates are laid in layers, the upper plate and the lower plate should meet the principle of 'same-layer staggered joint and different-layer laminated joint', the spliced joint should be tight, horizontal, flat and vertical, the plates with surface defects are strictly forbidden, and the fragments are strictly forbidden for laying construction;

a8.1, arranging a sliding layer to counteract deformation and displacement; the sliding layer adopts a double-layer PE film with the thickness of 0.4mm, and the PE film cannot be damaged during laying;

A8.2: the first layer of polyethylene film is paved, the film cannot be wrinkled, a polyethylene film joint is welded by hot melting, the lap joint of the joint is at least 10cm, the second layer of polyethylene film is paved by staggered joint with the first layer of film, the overlap joint is staggered with the overlap joint of the first layer by 1/3 of the width, two adjacent coiled materials are staggered by 1/2, and the upper layer of film and the lower layer of film cannot be paved vertically;

a9.1: the antifreeze reinforced concrete layer adopts the antifreeze grade of C35 with the thickness of 120 mm: f250, permeation resistance rating: p6 concrete, wherein two-way reinforcing steel bars of which the upper layer and the lower layer are C10@100×100 are paved;

a9.2: the anti-freezing reinforced concrete layer is used as an ice surface supporting body, and the concrete construction process is as follows:

a9.21: before the construction of the antifreezing reinforced concrete layer, concrete trial-mix work is carried out, the concrete mix proportion is determined, fiber reinforced concrete is preferably adopted, and the roxburgh fiber is adopted as a secondary reinforcing material of the concrete;

a9.22: before construction, embedding a fixing piece of the protective boundary wall to a fixing position according to the position of the deepened design drawing;

a9.23: the antifreezing reinforced concrete is required to be continuously poured at one time, and the overall flatness is not more than +/-5 mm;

a9.24: before the construction of the anti-freezing reinforced concrete, the sliding layer should be protected, and old tires are paved at the position where the pump pipe is paved for protection;

A9.25: after the measurement and paying-off, paving bidirectional steel bars, and controlling the spacing of the steel bars and the protection layer to meet the requirements;

a9.26: before pouring concrete, dotting the pre-poured field, and setting ash cakes, wherein the ash cakes are arranged in a quincuncial manner at intervals of 2 m; when concrete is poured, a fixed laser theodolite is erected around the site, the elevation of the concrete is controlled at any time, a laser concrete spreader is adopted to repeatedly vibrate the concrete in place, after the laser spreader is leveled, the 2 nd time of leveling is needed to be carried out by adopting a manual leveling ruler, the impurities on the surface of the concrete are removed, meanwhile, the surface cracks are closed, a plastic film is paved in time for maintenance after the pouring is completed, and the maintenance time is not less than 14 days;

a9.27: the method comprises the steps of arranging expansion joints on the inner side and the outer side of a ice rink, and adopting a structural sealing expansion joint system consisting of chloroprene rubber, firstly wiping off dust and scum on the surface by using a concrete surface treatment agent, coating an adhesive on the treated structural joint, wherein the coating degree is saturated and cannot cause a coating leakage phenomenon, then cutting and forming a rubber tube according to the size requirement, polishing the end head smoothly and cannot cause an uneven phenomenon, so that firm bonding is ensured, and no air leakage is caused; cutting a V-shaped notch to ensure smooth air flow during inflation; polishing plugs, polishing all bonding surfaces in place, preventing the bonding surfaces from being missed, brushing the rubber surface of the rubber tube by using a steel wire brush, removing a surface oxide layer, wiping the surface of the rubber tube cleanly by using a surface treating agent, smearing an adhesive on the processed rubber tube, finally placing rubber strips in a gap in a flush manner, sealing edges of two sides by using epoxy adhesive, and then inflating and expanding;

A9.28: after the concrete strength reaches 100% of the design strength, the ice making process of the ice surface can be performed;

a11.1: as a multipurpose ice rink, the ice making calandria and the bracket are movable, the ice surface is manufactured on the bracket and the exposed calandria, and a shaped aluminum alloy water retaining threshold is arranged to prevent the leakage of water for making ice;

a11.2: the water retaining threshold is arranged at the edge of the ice making pipe ditch only to ensure that the ice making branch pipe smoothly extends from the pipe ditch to the ice rink;

a11.3: the water blocking threshold is of a base and card structure, a 24mm wide groove is formed in the middle of the water blocking threshold, the ice making calandria passes through the groove, the water blocking threshold base is arranged at the edge of the ice making pipe groove, after the ice making calandria passes through the groove, the upper card is inserted into the base downwards, and the upper and lower two structures are folded to form a closed loop so as to prevent water for making ice from leaking;

a12.1: the movable ice discharging pipe adopts an HDPE-100 refrigerant pipe, and the bracket is a honeycomb bracket;

a12.2: the honeycomb-shaped bracket is in a buckle type, and the area is enlarged to be paved when the strength of the antifreeze reinforced concrete reaches 100%;

a12.3: after the bracket is installed, paving a refrigerant pipe, wherein the paving direction is from an ice making pipe ditch to the other side for continuous paving, and the paving direction is connected end to end and adopts a 'one-step-and-one-step' principle for paving;

A13.1: preparing before ice making, three-stage precooling, ice paint spraying, paint sealing, LOGO manufacturing, ice sealing and cleaning;

a13.2: the method comprises the steps of performing system debugging on integral ice making equipment before ice making, wherein the voltage, current, phase sequence, equipment operation sound, cooling water clean state and pressure maintaining state of a refrigerating pipeline are all in accordance with requirements, so that all the equipment can normally operate, a control system is stable and reliable, the normal water purifying system for ice making is ensured, purified water is used in the whole process of ice making, the concrete site is comprehensively and thoroughly flushed and cleaned, all other works with dust in the site are stopped, the water supply is sufficient, the paint spraying equipment is assembled and debugged, LOGO marks and ice paint check quantity are all in place, the glue of the ice site is completely paved, and the pressure of the water supply pipeline is not lower than 0.25Mpa;

a13.3: the humidity requirement of the whole stadium is below 50%, the basic ice is flat and has uniform temperature, the ice paint spraying operation can be carried out, and the whole ice making has the requirement on water quality: the conductivity of the purified water is less than 60 mu S/cm;

a13.4: after the ice paint is sprayed, the ice paint sealing and freezing operation is carried out, an operation water pipe cannot be dragged on the paint surface so as to prevent the ice surface from being stained, the whole paint sealing operation water is atomized water, the phenomenon of water drops cannot occur, the sole and the contact surface are treated when an operator operates, the temperature parameter cannot be changed at will in order to prevent the ice cracking phenomenon, and the thickness of the paint sealing is not less than 5mm;

A13.5: after the paint sealing operation is finished, various mark marks and advertisement LOGO are painted, the LOGO is required to be horizontally and vertically paved, the size is accurate, the ice vehicle mark is executed according to international standards, then the whole ice sealing operation is carried out, and a special ice spraying tool is adopted for construction;

a13.6: when the whole ice sealing operation is performed, the water quantity is required to be adjusted according to the freezing state, so that each layer of ice surface is ensured to be frozen completely, the next watering operation can be performed, the temperature control is formulated at any time by on-site operators according to the ice surface condition, and no operators cannot change the temperature parameters of the system without permission;

a13.7: after the freezing thickness reaches the design requirement, the whole ice making work is finished, and the ice making vehicle can be operated to clean the enclosure.

As a further improvement of the construction method, the BIM intelligent paying-off robot is adopted for controlling the construction quality of each functional layer, wherein:

setting field control points from the BIM model, positioning 6 lofting control points every 10m in the X-axis direction of a transverse longitudinal axis and every 30 m in the Y-axis direction to form 9 control plates, synchronously positioning and identifying the model and the field, refining the quality control of the whole field to one ninth, wherein each plate is an independent control unit, and 7 points are tested by each unit;

And (3) introducing the lofting control point into Trimble Field Link software, taking the lofting control point into the field, carrying out data acquisition on the field lofting control point, namely synchronously positioning the model to a field entity through accurate positioning identification of the point, realizing unification of the spatial positions of the model and the field, carrying out test on a computer by field management staff, clicking a model part in the computer, automatically aiming at the position of the field by infrared laser, acquiring coordinates of the point and compounding the coordinates with the model, and realizing accurate quality control to achieve that the quality control standard of each layer of plane is within +/-2 mm.

The invention is beneficial to the optimization of the initial design scheme, so that the raft concrete of the base layer achieves the effect of constant temperature, and the related problems of frost cracking, bulging and the like are avoided.

The construction method is not only beneficial to realizing the construction scheme optimized by the deepening method, but also has the advantages of convenient disassembly and good flexibility, wherein the concrete, the cold discharge pipes and the antifreezing heat pipes are separated.

Drawings

FIG. 1 is a node diagram of an ice multipurpose build layer approach.

Fig. 2 is a flow chart of a construction process of an ice surface structural layer.

Fig. 3 is a detailed view of the ice build-up layer.

Fig. 4 is a schematic diagram of a heating pipe lay.

FIG. 5 is a schematic view of the overall plan layout of the heating tube.

FIG. 6 is a schematic view of a partial plan layout of a heating tube.

Fig. 7 is a schematic diagram of sand ramming.

Fig. 8 is a schematic view of moisture barrier lay-up.

FIG. 9 is a schematic illustration of a concrete screed construction.

Fig. 10 is a schematic view of waterproof layer application.

FIG. 11 is a schematic illustration of the placement of a waterproof layer in an ice making trench.

Fig. 12 is a schematic illustration of insulation lay-up.

Fig. 13 is a schematic view of a sliding layer construction.

Fig. 14 is a schematic view of construction of an antifreeze and impervious reinforced concrete layer.

Fig. 15 is a schematic view of construction of an antifreeze and impervious reinforced concrete layer.

Fig. 16 is a detail view of the upper water deflector card.

Fig. 17 is a detail view of the lower water deflector base.

Fig. 18 is a schematic view of a removable ice bank and rack mounting.

Fig. 19 is a plan view of a movable ice bank tube.

Fig. 20 is a schematic diagram of ice making.

FIG. 21 is a simulation of the functional approach provided by the initial design.

Fig. 22 is a graph of heat transfer analysis of an optimum ice surface functional layer.

FIG. 23 is a graph showing the isotherm points of the most suitable ice surface functional layer.

FIG. 24 is a schematic diagram of a loft control point.

Reference numerals: 1. an ice surface layer; 2. the movable ice making exhaust pipe and the bracket layer; 3. a temporary waterproof layer; 4. an antifreezing reinforced concrete layer; 5. a sliding layer; 6. a heat preservation layer; 7. a waterproof coiled material layer; 8. fine stone concrete leveling layer; 9. a moisture barrier; 10. tamping a sand layer; 11. and (3) a concrete raft foundation layer.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

In order to build high-quality ice surface, the embodiment establishes an ice surface function making layer of an underground ice rink by applying BIM technology and simulation technology, and the specific deepening method is as follows:

1. BIM technology-based ice functional course of action layer heat transfer simulation

1) Selection of simulation software

The building entity model of the embodiment selects the Autodesk Revit which is currently mainstream and can bear the whole process information of the design, construction and operation and maintenance of the building, and the model not only can integrate the building information, but also can have good interactivity with various application software.

The simulation stage is currently applied to a wider range of simulation and numerical analysis software, such as Fluent, ansys, COMSOLMultiphysics.

Wherein COMSOL Multiphysics simulation software can be used with the geometric units in units of rooms in Revit software through LiveLink ^TM for

The plug-in derives the geometric information of the reserved model, automatically filters out tiny components such as an elongated surface, a short side, a chamfer angle, a small surface and the like which are not needed by the simulation, so that the subsequent simulation does not need to reestablish the model in the software, and the synchronism of model modification can be realized. Thus, the final decision application COMSOL Multiphysics uses the heat transfer module to perform the temperature transfer simulation of the ice surface functional layer. The heat transfer module can solve the problems including heat conduction, heat convection, heat radiation and any combination of the three,

While these heat transfer modes can be coupled to other physical fields. With the heat transfer module, self-flow convection, forced convection, process flow design, phase inversion, radiation conduction, and any combination of these heat transfer modes can be simulated. For the simulation of the thermal distribution condition of biological tissues, a special application mode is set in the module, and the data carding analysis is carried out by selecting the thermal conduction function according to the simple structure of the ice surface function making layer.

2) Simulation implementation

Firstly, in the early stage of construction, the embodiment builds a three-dimensional building information model of a new construction project and passes through LiveLink ^TM for

And synchronizing to simulation software, and inquiring the heat conductivity coefficient, density and constant-pressure hot melting coefficient of each functional layer by a project BIM team to obtain the following comparison table of the heat conductivity of the layers.

The ice surface temperature transfer simulation is performed on the original design change scheme by using the COMSOL Multiphysics heat transfer module.

Analog temperature value standard: setting the running time of the ice rink to 9 by referring to the business hours of the national swimming center: 00-21:00 (12 hours), the ambient temperature of the venue was 27 ℃, the ice temperature was-7 ℃ (the temperature of the olympic games was-7 to-9 ℃), the air speed was 0 (assuming a stationary environment), the heat transfer coefficient was 100, and a model of the ice center point was selected for temperature simulation.

The simulation shows that under the operation condition of no pressure for 12 continuous hours at the room temperature of 27 ℃, the phenomenon that the top temperature of the raft concrete is less than 24 ℃ can occur, and the phenomena that the raft concrete is cold-bridged, swelled and the like easily occur are mainly deepened in the following directions: the stability of the heat conductivity coefficient of the raft is realized by changing the functional layer between the raft and the ice layer, and the constant temperature of the raft foundation is realized.

In the embodiment, through researching the heat transfer comparison table of each functional layer, the ice functional practice layer is finally formulated after the combination arrangement of the front working procedures and the rear working procedures of 11 functional layers. The components and the sequence are (from bottom layer to ice surface layer, from bottom to top): basic raft concrete layer- & gt PE heating pipe layer- & gt 100mm sand layer- & gt PE film moisture-proof layer- & gt fine stone concrete leveling layer arrow- & gt SBS waterproof layer- & gt extruded polystyrene board heat preservation layer- & gt PE film sliding layer- & gt anti-freezing impervious concrete layer- & gt PE film temporary waterproof layer- & gt movable ice making calandria and bracket layer- & gt ice surface.

The results of the numerical simulation analysis are shown in the following graph. It can be known that the raft concrete temperature can be controlled at 24 ℃ and in a constant temperature state in a static non-pressure environment when the indoor temperature of a venue reaches 27 ℃ and the ice surface temperature reaches-7 ℃ within 12 operation hours. In addition, the antifreeze concrete in the scheme weakens the thickness, and saves the construction cost.

Performing site construction of the ice discharging pipe cutting function layer;

and (3) field construction quality control:

project group introduction BIM intelligent paying-off robot carries out each functional layer construction quality control, optimizes manual operation error, long operation time, personnel's efficiency low scheduling problem that traditional actual measurement mode can produce.

The BIM model is provided with field control points, 6 lofting control points are positioned every 10m in the X-axis direction of a transverse longitudinal axis and every 30 m in the Y-axis direction, 9 control plates are formed, synchronous positioning and identification are carried out on the model and the field, the quality control of the whole field is refined to one ninth, each plate is an independent control unit, and 7 points are tested in each unit.

The lofting control points are led into Trimble Field Link software, the project group brings the lofting robot into the field, data acquisition is carried out on the field lofting control points, namely, the model is synchronously positioned to a field entity through accurate positioning identification of the points, the unification of the spatial positions of the model and the field is realized, no specific quality control personnel are needed, the field management personnel can test on a hand computer, only the model part is needed to be clicked in the hand, the infrared laser can automatically align the position of the field, the coordinates of the point are obtained and compounded with the model, and the accurate quality control is realized to achieve that the quality control standard of each layer of plane is within +/-2 mm.

Example 2

In the embodiment, the total thickness of the multipurpose ice surface structure is 470mm, and the method sequentially comprises the following steps of:

a) A 30mm thick ice surface layer 1 (thickness is adjustable according to different functions);

b) A movable ice making row pipe with the thickness of 50mm and a bracket layer 2;

c) A temporary waterproof layer 3 (0.4 mm thick PE film);

d) A 120mm thick C35 anti-freezing (F250) impervious (P6) anti-cracking reinforced concrete layer (internally paved with upper and lower double-layer phi 10@100X100 bidirectional reinforcing steel bars);

e) A double-layer 0.4mm thick PE film sliding layer 5;

f) 100mm thick extruded polystyrene board heat insulation layer 6 (50 mm thick X2, double-layer staggered joint laying, compressive strength not lower than 300 kPa);

g) 4mm+3mm thick double-layer SBS modified asphalt waterproof coiled material layer 7 (polyester tyre II type, -25 ℃);

h) 60mm thick C20 fine stone concrete leveling layer 8 (internally provided with phi 4@200X200 cold-drawn steel wire mesh);

i) Moisture barrier 9 (0.4 mm thick PE film waterproof roll);

j) A 100mm thick rammed sand filling layer 10 (a built-in PE hot water pipe heating layer);

k) The original reinforced concrete bottom plate 11 with the thickness of 500-1500 mm;

the method is characterized in that the functional layers with the serial numbers d) to j) are arranged on the original reinforced concrete foundation slab in a permanent way, and b) and c) are arranged in a movable way. The technical requirements of the ice surface such as thickness, ice temperature, hardness, smoothness and the like can be set according to the requirements of specific on-ice sports.

The construction operation key points are as follows:

a1: base layer cleaning

Cleaning the base layer, ensuring the base layer to be flat, dry, free of sundries and loose. The flatness of the rechecked ground, the elevation of the ground and the size of the field are measured to meet the design requirements. Negative errors must not occur in the net width and net length of the ice rink.

A2: heating pipe laying

A2.1: the heating pipe adopts PE pipe, should be strictly according to the system design scheme of making ice and construct-the branch pipe interval is not more than 500mm. The spacing is controlled by the on-site elastic wires, and the protection of finished products in the construction process is paid attention to. The heating pipes are fixed by plastic pipe clamps with the interval of 1.5-2m.

A2.2: and (3) carrying out hot melting connection on the tee joint at the main pipe and the branch pipe by adopting a special temperature control hot melting machine, wherein cleaning of joint parts, hot melting control time and cooling fixing time after hot melting are paid attention to during connection.

A2.3: after the pipeline is installed, carrying out a hydraulic test, detecting after the initial pressure is 0.6Mpa and 24 hours, and if the pressure is reduced within the standard allowable range, reducing the pressure to 0.4Mpa until the construction of the whole ice making structural layer is completed.

A3: ramming sand layer

A3.1: the sand in the field should be filtered first to remove the stones with large particle size, and then backfilled.

A3.2: the ground of the ice rink area should be cleaned before the sand layer is paved, so that the ground is clean during backfilling, and no garbage is generated.

A3.3: and (3) performing PE pipeline pressure test before the sand layer is paved, wherein the pressure test value reaches 0.6Mpa, the pressure maintaining value reaches 0.4Mpa, and the PE pipeline pressure has no obvious pressure drop until the sand layer is paved.

A3.4: the sand layer is paved and is constructed according to the design requirement, the tamping machine is adopted to repeatedly tamper to ensure the tamping, the flatness is preferably controlled within +/-5 mm, and the elevation is controlled by the laser leveling instrument. The sand layer is laid and backfilled by matching the machine and the manual work, and the backfilling sequence is that the backfilling is carried out from outside to inside.

A4: laying moisture barrier

A4.1: the dampproof course adopts 0.4mm thick PE membrane for prevent ice surface steam conduction downwards, infiltration sand bed, lead to ramming sand bed frost heaving, thereby destroy the foundation mat, cause the irreversible damage of concrete floor.

A4.2: the PE films are connected by adopting a special temperature control hot-melting machine in a hot-melting way, so that single PE films are continuously hot-melted into a whole, and the moistureproof capacity is improved.

A5: concrete leveling layer

A5.1: paving phi 4@200×200 cold-drawn steel wire meshes, pouring a 60-thickness C20 fine stone concrete leveling layer, and pouring concrete according to the required blocks.

A5.2: and the concrete leveling layer is subjected to calendaring treatment to ensure that the flatness meets the requirements.

A5.3: in the process of concreting and curing, the pressure of the heating pipe system is kept at a pressure of not less than 0.4 Mpa. And after the concrete is poured, maintaining the concrete for at least 48 hours.

A6: waterproof layer construction

A6.1: the waterproof layer adopts a double-layer SBS modified asphalt waterproof coiled material with the thickness of 4mm+3mm (polyester tyre II type,

-25℃)。

a6.2: before the waterproof coiled material is paved, the base layer in the ice rink area should be cleaned, so that the base layer is hard and free of defects such as hollowness, sand, cracks, looseness, ash falling, uneven and the like, and is dry and clean.

A6.3: after the base layer is cleaned, the base layer treating agent should be painted to ensure the uniformity and consistency of the base layer treating agent.

A6.4: after the base layer treating agent is dried, additional layer treatment is carried out on the yin and yang corner parts according to design requirements, and an additional waterproof layer with the length of 500mm is additionally arranged.

A6.5: the lap width of the web was 100mm on each side. When laying the second layer of coiled material, the lap seam and the lap seam of the first layer are staggered by 1/3 of the amplitude of the coiled material. The adjacent two coiled materials are staggered by 1/2. The upper coiled material and the lower coiled material cannot be paved and pasted mutually vertically. The first layer and the second layer are staggered and fully adhered.

A6.6: after the coiled material is laid, the lap joint part, the end part and the coiled material collecting part are subjected to sealing treatment, and then trowelling is performed to form an obvious asphalt edge banding strip.

A7: laying heat-insulating layer

A7.1: the heat-insulating layer adopts a double-layer heat-insulating layer of extruded polystyrene board with the thickness of 50mm (total 100 mm). Before laying, the heat-insulating board typesetting deepening design should be carried out, and the construction is carried out strictly according to the typesetting diagram in the construction process.

A7.2: when the plates are laid in layers, the upper plate and the lower plate should meet the principle of 'same-layer staggered joint and different-layer laminated joint'. The joint should be tight, flat and vertical. And strictly prohibiting the use of the plates with the surface defects, and strictly prohibiting the use of fragments for paving construction.

A8: laying sliding layer

A8.1: in order to reduce the damage to each structural layer caused by slight deformation and displacement in the use process of the ice rink, a sliding layer is required to be arranged for counteracting the deformation and displacement. The sliding layer adopts a double-layer PE film with the thickness of 0.4mm, and the PE film cannot be damaged during laying, and if the PE film is damaged, the PE film needs to be replaced entirely.

A8.2: and (3) paving a first layer of polyethylene film, wherein the film cannot be wrinkled, and a polyethylene film joint is welded by hot melting, so that the lap joint of the joint is at least 10cm. The second layer of polyethylene film is to be laid with the first layer of film in a staggered way, the overlap joint is staggered with the overlap joint of the first layer by 1/3 of the width, and the adjacent two coiled materials are staggered by 1/2. The films on the upper layer and the lower layer cannot be paved and pasted mutually vertically.

A9: anti-freezing impervious reinforced concrete layer casting (Special 2m thick aluminum alloy water retaining sill)

A9.1: the antifreezing concrete layer is made of 120mm thick C35 antifreezing (F250) impervious (P6) concrete, and two-way reinforcing steel bars of which the upper layer and the lower layer are C10@100×100 are paved inside the antifreezing concrete layer.

A9.2: the anti-freezing impervious concrete layer is used as an ice bearing body, the construction quality of the anti-freezing impervious concrete layer is directly related to the ice quality, and the following matters should be noted in the construction process:

a9.21: before the construction of the anti-freezing and anti-seepage concrete, concrete trial-mix work is carried out, and the concrete mix ratio is determined. The concrete is preferably fiber reinforced concrete, wherein high-performance Luo Sai fibers are used as secondary reinforcing materials of the concrete, and a large number of experimental researches prove that: under the same mixing amount, the Caesalpinia-Sibirica fiber concrete has excellent durability such as crack resistance, seepage resistance, freeze thawing resistance and the like, and excellent mechanical and deformation properties such as split drawing, shrinkage, ultimate elongation, toughness and the like.

A9.22: before construction, the fixing piece of the protection boundary wall is pre-buried to a fixed position according to the position of the deepened design drawing.

A9.23: the antifreezing impervious reinforced concrete is required to be continuously poured at one time, and the overall flatness is not more than +/-5 mm.

A9.24: before the construction of the anti-freezing and anti-permeability reinforced concrete, the sliding layer should be protected, and the old tire is paved at the position where the pump pipe is paved for protection.

A9.25: after the measurement and paying-off, a bidirectional reinforcing steel bar is paved. The spacing of the steel bars is controlled, and the protective layer meets the requirements.

A9.26: before pouring concrete, dotting the pre-poured field, and arranging ash cakes with the interval of 2m and plum blossom shape. When concrete is poured, a fixed laser theodolite is erected around the site, and the elevation of the concrete is controlled at any time. And the laser type concrete paver is adopted to repeatedly vibrate the concrete in place. After the laser paver is leveled, the laser paver needs to be leveled by adopting a manual leveling ruler for the 2 nd time, so that impurities on the surface of the concrete are removed, and meanwhile, surface cracks are closed. And after pouring, a plastic film is paved in time for maintenance, and the maintenance time is not less than 14 days.

A9.27: in order to prevent the anti-freezing and anti-seepage concrete from cracking, expansion joints are arranged on the inner side and the outer side of the ice rink, a structural sealing expansion joint system consisting of chloroprene rubber is preferably adopted, and firstly, a concrete surface treating agent is used for wiping off surface dust and scum. And (3) coating an adhesive on the treated structural joint, wherein the coating degree is saturated, and the coating leakage phenomenon cannot occur. Cutting and forming the rubber tube according to the size requirement, and polishing the end head smoothly without the phenomenon of rugged so as to ensure firm bonding and no air leakage; cutting a V-shaped notch to ensure smooth air flow during inflation; and (3) polishing the plugs, wherein all the bonding surfaces need to be polished in place and cannot be missed. Then brushing the rubber surface of the rubber tube with a steel wire brush, removing the surface oxidation layer, wiping the surface of the rubber tube clean with a surface treating agent, smearing an adhesive on the processed rubber tube, finally placing the rubber strips in the gaps in a flush way, sealing edges on two sides with epoxy adhesive, and then performing inflation.

A9.28: after the concrete strength reaches 100% of the design strength, the ice making process of the ice surface can be performed.

A10: temporary waterproof layer

The multifunctional ice rink can be used as a ground for on-ice sports, commercial performances or other activities after being put into use as a finished product. As a base layer of a field, in order to protect the service life of the antifreeze and seepage-proof concrete, a PE film with the thickness of 0.4mm is additionally arranged to serve as a temporary waterproof layer, so that the problem that the antifreeze layer is irreversibly damaged due to repeated frost heaving caused by low-temperature and melted ice water penetrating into the concrete in the use process of the ice rink is prevented. The moisture-proof layer adopts a PE film with the thickness of 0.4mm, and a special temperature control hot-melting machine is adopted for hot-melting connection, so that a single PE film is formed into a whole by continuous hot-melting.

A11: installation of shaped aluminum alloy water retaining threshold

A11.1: as a multipurpose ice rink, the ice making calandria and the bracket are movable, and the ice surface is manufactured on the bracket and the exposed calandria. In order to prevent the water for making ice from leaking from one side of the ice making discharging pipe, the process specially makes the shaped aluminum alloy water retaining threshold, and prevents the water for making ice from leaking.

A11.2: the water retaining threshold needs to be installed before the movable ice bank pipes and the brackets are installed. The water blocking threshold is only arranged at the edge of the ice making pipe ditch and used for ensuring that the ice making branch pipe smoothly extends from the pipe ditch to the ice rink.

A11.3: the water blocking threshold is of a base and card structure, a 24mm wide groove is formed in the middle of the water blocking threshold, and the ice making calandria passes through the groove. The water blocking threshold base is arranged at the edge of the ice making pipe ditch, after the ice making pipe passes through the groove, the upper clamping sheet is inserted into the base downwards, and the upper structure and the lower structure are folded to form a closed loop, so that the leakage of ice making water is prevented.

A12: installation of movable ice bank pipe and bracket

A12.1: the movable ice discharging pipe adopts an HDPE-100 refrigerant pipe, and the bracket is a honeycomb bracket.

A12.2: the honeycomb bracket is in a buckle type, and can be paved in a large area when the strength of the anti-freezing and anti-permeability concrete reaches 100%.

A12.3: after the bracket is installed, the refrigerant pipe is paved, the paving direction is continuously paved from the ice making pipe ditch to the other side, the end to end is connected, and the 'one-step-and-one' principle is adopted for paving.

A13: ice surface making

a13.2: and (3) carrying out system debugging on the whole ice making equipment before ice making. The voltage, the current, the phase sequence, the running sound of equipment, the clean state of cooling water and the pressure maintaining state of a refrigerating pipeline meet the requirements, so that all the equipment can normally run, a control system is stable and reliable, the normal water purifying system for ice making is ensured, purified water is used in the whole process of ice making, the concrete site is comprehensively and thoroughly flushed and cleaned, other work with dust is stopped, and the sufficient water supply is ensured. And (3) assembling and debugging paint spraying equipment, wherein LOGO marking lines and ice paint checking quantity are all in place. And (5) finishing the whole paving of the ice field glue. The pressure of the water supply pipeline is not lower than 0.25Mpa.

The following table requires the preparation before ice making:

sequence number	Design parameters	Design requirements
			1	Ambient temperature	≤24℃
2	Relative humidity of	≤40～50％
			3	Lighting device	Continuous operation, 24h illumination is required
4	Ice making water	Cleaning and hydraulic pressure confirmation
			5	Electricity demand	380V/5KW
6	Environmental cleanliness	No dust and dust
			7	Refrigerating system	The temperature of ice surface is reduced according to the requirements of an icemaker
8	Wall mounting	The frame part must be completed
			9	Primer paint	Ice white non-woven fabric or white paint
10	Ice hockey line	Drawing according to international ice linkage requirements
			11	Ice LOGO	40-60 g of non-woven fabric, water permeation and ventilation
12	Ice pouring device	Sprinkler and paint spraying device
			13	Personnel requirements	Icemaker and person

A13.3: ice making begins with less than 50% humidity requirements for the overall venue. The basic ice must be smooth and even in temperature, and can be used for ice paint spraying operation. The whole ice making requires water quality: the conductivity of purified water was less than 60. Mu.S/cm (about 400 for tap water).

A13.4: the ice paint sealing and freezing operation is carried out after the ice paint spraying is finished, an operation water pipe cannot be dragged on the paint surface so as to prevent the ice surface from being stained, the whole paint sealing operation water is mist water, the phenomenon of water drops cannot occur, the sole and the contact surface are treated during the operation of operators, and in order to prevent the phenomenon of ice cracking, the temperature parameters of non-operators cannot be changed at will. The thickness of the sealing paint is not less than 5mm.

A13.5: after the paint sealing operation is finished, various marking marks and advertisement LOGO are painted, the LOGO is paved, the horizontal and vertical direction is required, the size is accurate, and the ice car marking is executed according to the international standard. And then carrying out integral ice sealing operation, and carrying out construction by adopting a special ice spraying tool.

A13.6: when the whole ice sealing operation is performed, the water quantity is adjusted according to the freezing state, so that each layer of ice surface is ensured to be frozen completely, the next watering operation can be performed, and the temperature control is formulated by on-site operators at any time according to the ice surface condition. The non-operator must not be unauthorised to alter the system temperature parameters.

A13.7: after the freezing thickness reaches the design requirement, the whole ice making work is finished, and the ice making machine can be operated. The enclosure is cleaned.

The embodiment has the advantages of optimized structure and reliable quality: the embodiment combines the actual environment of repeated freezing and thawing of the true ice surface of the ice rink, optimizes the functional relation of each detail of the structural layer, has strict logic and strong operability of each procedure, fully considers the destructive effects of deformation, expansion and shrinkage and high and low temperature limit use of each functional layer of the ice surface structure caused by the repeated freezing and thawing environment of the true ice layer, and has reliable quality control.

The embodiment is repeatedly disassembled, energy-saving and environment-friendly: the novel movable ice bank pipe and the novel technical ice rink with the bracket are adopted for the ice surface pipe, concrete is not required to be poured, the ice surface pipe can be repeatedly disassembled, and the quick conversion between the ice surface and the concrete terrace can be realized. The installation is convenient and quick, and the later maintenance cost is low.

The technology of the underground square ice rink in the embodiment is a novel ice rink adopting a movable ice bank and a bracket, and provides new requirements for controlling the evenness of ice surface and ensuring the temperature uniformity of the ice surface. The rink functional layer construction of this embodiment underground square to the surface fracture of control concrete under the ice layer, guarantees the roughness of concrete under the ice layer, takes the measure to carry out the effective isolation of cold and hot area, prevents cold and heat exchange, has all obtained fine effect. The investment cost is low, the energy consumption is saved in the subsequent operation, the maintenance cost is low, and good economic benefit is obtained.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several equivalent substitutions and obvious modifications can be made without departing from the spirit of the invention, and the same should be considered to be within the scope of the invention.

Claims

1. A movable ice making deepening method based on BIM is characterized by comprising the following steps:

wherein S1 comprises:

Synchronizing to simulation software COMSOL Multiphysics, inputting parameters of heat conductivity coefficient, density and constant-pressure heat fusion coefficient of each functional layer to apply COMSOL Multiphysics heat transfer modules to simulate ice temperature transfer of an initial design scheme;

in S1.2, the ice surface temperature transfer simulation comprises heat conduction, heat convection, heat radiation and heat transfer forms of any combination of the three and is coupled with a relevant physical field, and a heat transfer module is selected for data carding analysis on the basis of the constructed ice surface functional layer so as to obtain a cold bridge, a bulge and a relevant phenomenon of a base layer under the functional layer;

setting site operation time;

setting an air speed;

setting a heat transfer coefficient;

according to the simulation result, obtaining the temperature limit reached by raft concrete serving as a base layer in the set site operation time, wherein when the temperature limit is lower than the temperature limit, a cold bridge and a bulge can be caused;

the determination of the deepening direction is as follows: the stability of the thermal conductivity coefficient is achieved by adjusting the functional layer between the concrete raft as the base layer and the ice layer so that the concrete raft as the base layer is at the temperature limit.

2. The method for deepening movable ice practice based on BIM according to claim 1, wherein in S1.2: the ice surface functional layer of the initial design scheme is sequentially arranged from top to bottom as follows:

30mm ice surface layer;

a 50mm removable ice bank, which is used as ice surface when in use;

150mm C35F 200 antifreeze reinforced concrete reinforcement layer;

0.4mmHPDE slip layer;

100mm extruded polystyrene board insulation layer;

SBS modified asphalt waterproof coiled material layer;

a 90mm rammed sand layer with a heating pipe arranged inside;

100mm C15 fine stone concrete screed.

3. The method for deepening the movable ice surface practice based on the BIM according to claim 1, wherein in the step S2, the adjusted functional layer is determined as follows, and the method is sequentially set from bottom to ice surface layer as follows:

4. A construction method based on the deepening method of claim 1, which is characterized by comprising the following steps:

a1: cleaning a concrete raft foundation layer;

a2: paving a heating pipe on the base layer of the A1;

a3: the tamping sand layer buries the heating pipe;

a4: paving a moisture-proof layer on the basis of the A3;

a5: pouring a concrete leveling layer on the basis of the A4;

a6: carrying out construction of a waterproof layer on the basis of the A5;

a7: paving an insulation layer on the basis of the A6;

a8: paving a sliding layer on the basis of the A7;

a9: pouring an antifreezing reinforced concrete layer on the basis of the A8;

a10: setting a temporary waterproof layer on the basis of A9;

a11: installing a shaped aluminum alloy water retaining threshold;

a13: and (5) making ice surface.

5. The construction method according to claim 4, wherein A2 comprises:

6. The construction method according to claim 5, wherein A3 comprises:

7. The construction method according to claim 4, wherein A4 comprises:

a4.2: the PE films are connected by adopting a special temperature control hot-melting machine in a hot-melting way, so that the single PE film is continuously hot-melted to form a whole.

8. The construction method according to claim 4, wherein A5 to a13 comprise:

a5.1: paving a phi 4@200×200 cold-drawn steel wire mesh, pouring a 60mm thick C20 fine stone concrete leveling layer, and pouring concrete according to the required blocks;

A8.2, paving a first layer of polyethylene film, wherein the film cannot be wrinkled, a polyethylene film joint is welded by hot melting, the lap joint of the joint is at least 10cm, paving a second layer of polyethylene film and the first layer of film in a staggered way, wherein the lap joint and the lap joint of the first layer of film are staggered by 1/3 of the width, two adjacent coiled materials are staggered by 1/2, and the upper layer of film and the lower layer of film cannot be paved vertically;

a13.2: the method comprises the steps of performing system debugging on integral ice making equipment before ice making, wherein the voltage, current, phase sequence, equipment operation sound, cooling water clean state and pressure maintaining state of a refrigerating pipeline are all in accordance with requirements, so that all the equipment can normally operate, a control system is stable and reliable, the normal water purifying system for ice making is ensured, purified water is used in whole time for ice making, a concrete site is comprehensively and thoroughly flushed and cleaned, other works with dust raising in the site are stopped, water supply is sufficient, assembling and debugging of paint spraying equipment is ensured, LOGO marks and ice paint check quantity are all in place, the whole paving of ice site glue is finished, and the pressure of a water supply pipeline is not lower than 0.25Mpa;

a13.3: the method is characterized in that the method comprises the steps of starting ice making, requiring humidity of an integral stadium to be below 50%, leveling basic ice, and carrying out ice paint spraying operation, wherein the integral ice making requires water quality: the conductivity of the purified water is less than 60 mu S/cm;

a13.6: when the whole ice sealing operation is performed, the water quantity is required to be adjusted according to the freezing state, so that each layer of ice surface is completely frozen to perform the next watering operation, the temperature control is formulated at any time by on-site operators according to the ice surface condition, and no operators cannot change the temperature parameters of the system without permission;

a13.7: after the freezing thickness reaches the design requirement, the whole ice making work is finished, the ice feeding vehicle is operated, and the enclosure is cleaned.